Android Studio dev kvm device permission denied

Question

When I try to run my Android app on an emulator I get this error        dev kvm permission denied     I checked the permissions and added the user I am currently logged in with to the kvm group  What is wrong

User · Answer

sudo chown  USER  dev kvm  Simply running that one command worked for me here in September 2019 running   Description   Ubuntu 18 04 3 LTS Release  18 04 Codename  bionic

User · Answer

This Worked For Me on Linux  x18     9745   Hope It Will Work For You Aswell   sudo chown hp  dev kvm

User · Answer

There s absolutely no need to install qemu-kvm  and all its dependencies  if you only want to run the Android Studio Emulator   The only thing you have to do is to give your user  i e  the one you are logged in with  the right to access the  dev kvm-device   This is done in three simple steps   First   Create the kvm-group  groupadd -r kvm  The option -r creates a system group  i e  with a GID  lt   999  see  etc login defs    SYS GID MAX   Second   Change permissions on  dev kvm  This could be done as part of the qemu-kvm-installation  because one of the dependencies is installing qemu-system-common  on current Ubuntu systems  package name may vary   which in turn installs the file  lib udev rules d 60-qemu-system-common rules containing the following   KERNEL   kvm   GROUP  kvm   MODE  0660    So if you are just create a file  etc udev rules d 60-qemu-permissions rules containing the above line  you are done with the first step   Third   Add your username to the group by executing  usermod -a -G kvm  lt your username gt  - the -a is important for adding your user to the kvm-group  Without that you will overwrite the group-settings for your user to only belonging to  kvm      That s it   For the new udev rule and group setting to take effect it s easiest to reboot and login again   You can also execute  udevadm control --reload-rules  amp  amp  udevadm trigger  for reloading the rules but you still have to logout and login again with regard to the new group

User · Answer

Just one slight improvement on Jerrin s answer on fixing this error with Ubuntu 18 04 by utilizing  USER variable available in the bash terminal  So you could use the following commands two commands    sudo apt install qemu-kvm   Add the current user to the kvm group  sudo adduser  USER kvm   Also if you are still having issues  one other problem for me was the way in which I installed Ubuntu  I made the mistake of checking the box during installation for installing 3rd party software which did not play nice with my nvidia graphics card for development  So I reinstalled Ubuntu with this third party software unchecked     Then after installation  open up Software  amp  Updates and go to the Additional Drivers tab  Select the most up to date proprietary drivers that have also been tested and apply changes  Should restart the machine for the changes to take affect

User · Answer

As mentioned in the comments  starting with Ubuntu 18 04 and Linux Mint Tara you need to first sudo apt install qemu-kvm   To check the ownership of  dev kvm use  ls -al  dev kvm   The user was root  the group kvm  To check which users are in the kvm group  use  grep kvm  etc group   This returned  kvm x some number    on my system  as there is nothing rightwards of the final    there are no users in the kvm group   To add your user to the kvm group  you could use  sudo adduser  USER kvm   which adds the user to the group  and check once again with grep kvm  etc group    As mentioned by  marcolz  the command newgrp kvm should change the group membership live for you  If that did not work   Knossos mentioned that you might want to log out and back in  or restart   for the permissions to take effect  Or do as  nmirceac mentioned and re-login in the same shell via su -  USER

User · Answer

This is because  dev kvm is not accessible  To make is accessible from android studio run the below command  sudo chmod 777 -R  dev kvm   It will ask for your password  After that restart Android Studio   KVM is required to rum emulator  If you have not install it yet then install it  sudo apt install qemu-kvm

User · Answer

Step 1   Install qemu-kvm  sudo apt install qemu-kvm  Step 2   Add your user to kvm group using  sudo adduser username kvm  Step 3   If still showing permission denied  sudo chown username  dev kvm  Final step  ls -al  dev kvm

User · Answer

sudo setfacl -m u  USER rwx  dev kvm   Worked for me

User · Answer

I was in a similar situation with the same error of permissions on  dev kvm I had done the necessary installations but not added the user to the kvm group All I had to do was  sudo adduser  lt Replace with username gt  kvm   and ofcourse DON T forget to restart your Ubuntu instance

User · Answer

Open Terminal and log as admin   sudo su   Go to the dev folder  cd  dev    Change the kvm mode  chmod 777 -R kvm

User · Answer

In order to make a virtual device in Linux - I have to follow this three command and it helps me to avoid trouble for building avd devices - the process are -  sudo apt install qemu-kvm sudo adduser  USER kvm sudo chown  USER  dev kvm    so  now you are good to go  restart android studio and start building application with emulator

User · Answer

Running the below command in Ubuntu 18 04 worked for me sudo chown -R   dev kvm

User · Answer

Try this  it worked for me   sudo apt install qemu-kvm  sudo chown -R  lt username gt   lt username gt   dev kvm

User · Answer

This is how I got it to work in Ubuntu 18 04  sudo apt install qemu-kvm   Add your user to kvm group using   sudo adduser  lt Replace with username gt  kvm   If still showing permission denied   sudo chown  lt Replace with username gt   dev kvm   Try it

User · Answer

Under Ubuntu  the permissions of  dev kvm usually look like this    ls -l  dev kvm crw-rw---- 1 root kvm 10  232 May 24 09 54  dev kvm  The user that runs the Android emulator  i e  your user  needs to get access to this device  Thus  there are basically 2 ways how to get access   Make sure that your user is part of the kvm group  requires a re-login of your user after the change  Widen the permissions of that device such that your user has access  requires a change to the udev daemon configuration   Add User to KVM Group Check if your user is already part of the kvm group  e g     id  uid 1000 juser  gid 1000 juser  groups 1000 juser  10 wheel   If it isn t then add it with e g     sudo usermod --append --groups kvm juser  After that change you have to logout and login again to make the group change effective  check again with id   Widen Permissions Alternatively  you can just can widen the permissions of the  dev kvm device  Example  echo  KERNEL   quot kvm quot   GROUP  quot kvm quot   MODE  quot 0666 quot   OPTIONS   quot static node kvm quot           sudo tee  etc udev rules d 99-kvm4all rules sudo udevadm control --reload-rules sudo udevadm trigger --name-match kvm  FWIW  this is the default on other distributions such as Fedora and CentOS  Check the effectiveness of the above commands with another ls  You should see output similar to    ls -l  dev kvm crw-rw-rw-  1 root kvm 10  232 2020-05-16 09 19  dev kvm  Big advantage  You don t need to logout and login again for this change to be effective  Non-Solutions  calling chmod and chown directly on  dev kvm - 1  these changes aren t persistent over reboots and 2  since  dev kvm permissions are controlled by the udev daemon  it can  fix  its permissions at any time  e g  after each emulator run adding executable permissions to  dev kvm - your emulator just requires read and write permissions changing permissions recursively on  dev kvm - I don t know what s up with that - looks like cargo cult installing extra packages like qemu - you already have your emulator installed - you just need to get access to the  dev kvm device

User · Answer

I got this error after updating my ubuntu to 18 04 1  I just download new system image for emulator or you can say that download new emulator and it is worked for me

User · Answer

What finally fixed it for me on Ubuntu 18 04 was   sudo apt install qemu-kvm sudo adduser  USER kvm sudo chown  USER  dev kvm

User · Answer

I am using linux debian  and i am facing the same way  In my AVD showing me a message   dev kvm permission denied  and i tried to find the solution  then what i do to solve it is  in terminal type this    sudo chmod -R 777  dev kvm   it will grant an access for folder  dev kvm then check again on your AVD   the error message will disappear  hope it will help

User · Answer

Although KVM is a module built into the Linux kernel itself  it doesn t mean that all the necessary packages are included in your Ubuntu Linux install by default  You ll need a few to get started  and they can be installed with this command in the terminal        amp  sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virt-manager       Configure the network bridge     In order for your virtual machines to access your network interface and be assigned their own IP addresses  we need to configure bridged networking on our system   First  run the following Linux command in order to find out what name your network interface has been assigned  Knowing this will allow us to do additional configuration later         ip a              In my case  the network interface is called enp2s0  Yours will likely be very similarly named   In order to tell Ubuntu that we want our connection to be bridged  we ll need to edit the network interfaces configuration file  Doing this won t negatively impact your connection at all  It ll just allow that connection to be shared with the VMs        Use code  Visual Studio Code  or your favorite text editor to open the following file     code  etc network interfaces        When you first open this file  it may be empty or contain just a couple of lines  Your bridge interface is called br0  so add the following line for the interface to come up by default       auto br0       Below this line  add the following line for your current network interface  the one who s named you determined earlier    iface enp2s0 inet manual   Next  you can add the bridge information  These lines tell Ubuntu that your bridge will use DHCP for automatic IP address assignment  and your bridge will manage your current interface       iface br0 inet dhcp       bridge ports enp2s0   This is how your file should look once all the changes have been applied  if you also have a couple of lines that were already there  it s fine to have them too      Save your changes and exit the file   Add your user to the groups      In order to manage your virtual machine s  without root privileges  your user will need to belong to two user groups  Run the following commands to add your user to the appropriate groups  replacing user1 with the name of your user      sudo adduser user1 libvirt   sudo adduser user1 libvirt-qemu   sudo adduser user1 kvm   When you re done  you should restart your system to ensure that all of the changes done to your user and network configuration have a chance to take effect

User · Answer

Type in terminal   sudo apt install qemu-kvm -y sudo chown  USER  dev kvm

User · Answer

Here is a simple solution open the terminal and run the following commands sudo groupadd -r kvm   sudo gedit  lib udev rules d 60-qemu-system-common rules  Add the following line to the opened file and save it  KERNEL   quot kvm quot   GROUP  quot kvm quot   MODE  quot 0660 quot   Finally run  sudo usermod -a -G kvm  lt your username gt   Reboot your PC and Done

User · Answer

If you open your ide with sudo  You are not going to have this problem

User · Answer

I tried sudo setfacl -m u UserName rwx  dev kvm   and it works    In the android studio you need to change   tools gt  avd manager  gt  chose the pen to edit your device and change  graphics  from automatic to software   to avoid emulator drawable error

User · Answer

Provide appropriate permissions with this command  sudo chmod 777 -R  dev kvm

User · Answer

Have you also tried following  it should work   sudo chown  lt username gt   dev kvm sudo chmod o x  dev kvm

User · Answer

I am using ubuntu 18 04  I was facing the same problem  I run this piece of command in terminal and problem is resolved   sudo chown  USER  dev kvm   the above command is for all the user present in your system   If you want to give access to only a specific user then run this command  sudo chown UserNameHere  dev kvm

User · Answer

I countered the same problem and to solve this issue just type the following commands in terminal for Linux clients     sudo apt-get install qemu-kvm         type your password     sudo chmod 777 -R  dev kvm   and after that try running simulator it ll work

[64-bit] Android Studio: /dev/kvm device permission denied

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